Vanguard
/vˈæˌnɡɑrd/
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Definition
(noun) The leading units at the front of an army or fleet.
Sentence Examples
The Communist Party is the vanguard of the working class.
An army was divided into the vanguard, the rearguard and the main body.
CEFR Practice Quiz
The company has always been in the ____ of electronic technology, developing several new and innovative products every single year today.